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14.1: Constantes numéricas

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    Constantes Fundamentales

    c velocidad de la luz 2.998 × 10 8 m/s
    \(\varepsilon_{\mathrm{o}}\) permitividad de espacio libre 8.854 × 10 -12 F/m
    \(\mu_{\mathrm o}\) permeabilidad del espacio libre 4\(\pi\) × 10 -7 H/m
    \(\eta_{\mathrm o}\) impedancia característica del espacio libre 376.7\(\Omega\)
    e carga de un electrón, (-e.v. /Joule) -1.6008 × 10 -19 C
    m masa de un electrón 9.1066 × 10 -31 kg
    m p masa de un protón 1.6725 × 10 -27 kg
    h Constante de Planck 6.624 × 10 -34 Js
    k Constante de Boltzmann 1.3805 × 10-23 J/K
    N o Constante de Avogadro 6.022 × 10 23 molécula/mol
    R Constante universal de gas 8. 31 J/molek

    A.2 Conductividad eléctrica σ, S/m

    Plata 6.14 × 10 7 Monel 0.24 × 10 7
    Cobre 5.80 × 10 7 Mercurio 0.1 × 10 7
    Oro 4.10 × 10 7 Agua de Mar 3 — 5
    Aluminio 3.54 × 10 7 Agua Destilada 2 × 10 -4
    Tungsteno 1.81 × 10 7 Baquelita 10 -8 — 10 -10
    Latón 1.57 × 10 7 Vidrio 10 -12
    Níquel 1.28 × 10 7 Mica 10 -11 — 10 -15
    Hierro (puro) 1.0 × 10 7 Petróleo 10 -14
    Acero 0.5 — 1.0 × 10 7 Cuarzo Fundido <2 × 10 -17
    Plomo 0.48 × 10 7

    Constante dieléctrica relativa ε/ε o a 1 MHz

    Vacío 1.00 Vidrios Vycor 3.8
    Espuma de poliestireno (25% de relleno) 1.03 Vidrio de baja pérdida 4.1
    Firwood 1.8 — 2.0 Hielo 4.15
    Papel 2.0 — 3.0 Cristal Pyrex 5.1
    Petróleo 2.1 Moscovita (mica) 5.4
    Parafina 2.1 Mica 5.6 — 6.0
    Teflón 2.1 Silicato de magnesio 5.7 — 6.4
    Vaselina 2.16 Porcelana 5.7
    Caucho 2.3 — 4.0 Óxido de aluminio 8.8
    Poliestireno 2.55 Diamante 16.5
    Suelo arenoso 2.6 Alcohol etílico 24.5
    Plexiglás 2.6 — 3.5 Agua destilada 81.1
    Cuarzo fundido 3.78 Dióxido de titanio 100

    Permeabilidad Relativa μ/μ o

    Vacío 1
    Tejido biológico 1
    Acero frío 2,000
    Hierro (99.91%) 5,000
    Hierro purificado (99.95%) 180,000
    mu metal (FenicRCu) 100,000
    Supermalloy (Fenimomn) 800,000

    This page titled 14.1: Constantes numéricas was last modified on Sun, 30 Oct 2022 18:58:35 GMT and is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by David H. Staelin (MIT OpenCourseWare) via source content that was edited to the style and standards of the LibreTexts platform.